Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Dissociation constant

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Administrative data

Link to relevant study record(s)

dissociation constant
Data waiving:
study technically not feasible
Justification for data waiving:
the study does not need to be conducted because the substance has no ionic structure

Description of key information

No dissociating groups present in the molecule.

Key value for chemical safety assessment

Additional information

In accordance with column 2 of REACH Annex IX, a study does not need to be conducted if it is scientifically not possible to perform the test (e.g. because the analytical method is not sensitive enough). In accordance with chapter R.7.1.17 of REACH Guidance on Information Requirements and Chemical Safety Assessment, ch. R.7a, testing is not required if the substance does not contain an ionisable functional group. This is supported by the result from ChemAxon pKa calculator (Calculator Plugin 17.14.0 (2017-07-03), it concludes that no ionisable atom was found, based on Canonical SMILES: CC1=C(C(=CC=C1)Cl)C. This is in support for the substance having no ionisable functional groups in the normal pKa range.